Combination bull plug



FIG. 1 is a top perspective view of a combination bull plug, showing my new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a cross-sectional view taken along A-A section cut line per FIG. 3. 

CLAIM The ornamental design for a combination bull plug, as shown. 